This document discusses the energy band structure of materials and their properties. It explains that materials have discrete energy bands for their atoms, and that semiconductors without impurities have a small energy gap that allows a small number of electrons to be liberated as temperature increases. Insulators are then described as having an even larger energy gap between bands that prevents conductivity except at very high temperatures. The document also mentions electrical engineering concepts and circuit theory fundamentals.

1. ELECTRICAL ENGINEERING
MATERIALS
MR. ASIF L. JAMADAR

2. ENERGY-BAND OF MATERIALS
 Bands of allowed energy levels for the atoms
 Energy bands are discrete for single atom
2

3. 3
 Semiconductor material without impurities
 Accordingly as temperature increases……
 At room temperature approximately one out of 1010 atoms has liberate the
electrons

4. 4
 Energy band description of an insulator
 Energy gap is considerably larger than the semiconductors
 The conductivity of such materials

5. PROPERTIES OF ENGINEERING MATERIALS
5

6. ELECTRICAL ENGINEERING CONCEPTS
 Science of electrical engineering
 Discoveries of circuit theory fundamentals
6

7. THANK
YOU
7